bush and barack obama. what are the opsuns given the military has made it alert the chemical weapons are not acceptable. >> well, there are a brood range of messages. if you just want to make it clears after you are finished that it is not a good idea to do it again. so the mission objective determines all of this. but you are not going to attack the chemical weapons themselves because that is too dangerous. so that means in my view, you have a range of military targets that you could strike. air bases, ground basis. air forces. aircraft on the ground and ground force units. >> do you strike women this missiles, bombers, something more -- even closer to the targets? >> i think you want to do them in a way that minimizes the risk to your forces, so i think b2 bombers which are generally well out of reach of air defenses and cruise missiles as well. >> the military says it is a target-rich environment, i assume? >> i think there are a range of targets you could go after, but a key goal of this operation too w